package com.codingxyz.simple.prodconsumer;


import java.util.concurrent.locks.Condition;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;

/**
 * 题目：多线程之间按顺序调用，实现A->B->C三个线程启动，要求如下
 * AA打印5次，BB打印10次，CC打印15次
 * 紧接着AA打印5次，BB打印10次，CC打印15次
 * .....
 * 10轮
 */
class ShareResource{

    private int number = 1;

    private Lock lock = new ReentrantLock();

    private Condition c1 = lock.newCondition();
    private Condition c2 = lock.newCondition();
    private Condition c3 = lock.newCondition();

    public void print5(){

        lock.lock();

        try {

            //判断
            while (number !=1 ){
                c1.await();
            }

            for(int i=1;i<=5;i++){
                System.out.println(Thread.currentThread().getName()+" \t "+i);
            }

            //通知
            number = 2;

            c2.signal();

        }catch (Exception e){
            e.printStackTrace();
        }finally {
            lock.unlock();
        }
    }


    public void print10(){

        lock.lock();

        try {

            //判断
            while (number !=2 ){
                c2.await();
            }

            for(int i=1;i<=10;i++){
                System.out.println(Thread.currentThread().getName()+" \t "+i);
            }

            //通知
            number = 3;

            c3.signal();

        }catch (Exception e){
            e.printStackTrace();
        }finally {
            lock.unlock();
        }
    }

    public void print15(){

        lock.lock();

        try {

            //判断
            while (number !=3 ){
                c3.await();
            }

            for(int i=1;i<=15;i++){
                System.out.println(Thread.currentThread().getName()+" \t "+i);
            }

            //通知
            number = 1;

            c1.signal();

        }catch (Exception e){
            e.printStackTrace();
        }finally {
            lock.unlock();
        }
    }

}

public class SyncAndReentrantLockDemo {


    public static void main(String[] args) {
        ShareResource shareData = new ShareResource();

        new Thread(()->{

            for(int i=0;i<10;i++){
                shareData.print5();
            }

        },"A").start();

        new Thread(()->{

            for(int i=0;i<10;i++){
                shareData.print10();
            }

        },"B").start();


        new Thread(()->{

            for(int i=0;i<10;i++){
                shareData.print15();
            }

        },"C").start();
    }

}
